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Simplifying xy + -7x + 3y + -21 = 0 Reorder the terms: -21 + -7x + xy + 3y = 0 Solving -21 + -7x + xy + 3y = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21' to each side of the equation. -21 + -7x + xy + 21 + 3y = 0 + 21 Reorder the terms: -21 + 21 + -7x + xy + 3y = 0 + 21 Combine like terms: -21 + 21 = 0 0 + -7x + xy + 3y = 0 + 21 -7x + xy + 3y = 0 + 21 Combine like terms: 0 + 21 = 21 -7x + xy + 3y = 21 Add '-3y' to each side of the equation. -7x + xy + 3y + -3y = 21 + -3y Combine like terms: 3y + -3y = 0 -7x + xy + 0 = 21 + -3y -7x + xy = 21 + -3y Reorder the terms: -21 + -7x + xy + 3y = 21 + -3y + -21 + 3y Reorder the terms: -21 + -7x + xy + 3y = 21 + -21 + -3y + 3y Combine like terms: 21 + -21 = 0 -21 + -7x + xy + 3y = 0 + -3y + 3y -21 + -7x + xy + 3y = -3y + 3y Combine like terms: -3y + 3y = 0 -21 + -7x + xy + 3y = 0 The solution to this equation could not be determined.
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